Results 31 to 40 of about 1,886 (220)

Interplay of reversible chain transfer and comonomer incorporation reactions in coordination copolymerization of ethylene/1–hexene [PDF]

Polyolefins Journal, 2019
Coordinative chain transfer polymerization (CCTP) has opened a new path for the development of novel products like olefin block copolymers and chain-end functional polyolefins.
Ali Ebrahimi, Saeid Ahmadjo, Mohsen Mohammadi, Mohammad-Mahdi Mortazavi, Mostafa Ahmadi   +4 more
doaj   +1 more source

An Integrated AHP-PROMETHEE Method for Selecting the most Suitable Ethylene Propylene Diene Termonomer [PDF]

Journal of Petroleum Science and Technology, 2016
This paper considers the problem of selecting the most appropriate ethylene propylene diene monomer (EPDM), which is a polyolefin with a variety of usages in different areas.
Ali Sibevei, Zahra Naji Azimi, Saied Ahmadjo, Mohammad Mahdi Mortazavi   +3 more
doaj   +1 more source

Dynamic Resolution of a Metallocene:  Diastereoselective Assembly of an Early-Late Heterobimetallic Metal-Bridged ansa-Metallocene Opening a Route to Parallel Catalyst Synthesis

, 2016
Dynamic Resolution of a Metallocene:  Diastereoselective Assembly of an Early-Late Heterobimetallic Metal-Bridged ansa-Metallocene Opening a Route to Parallel Catalyst ...
T. Keith Hollis (1544095), Li-Sheng Wang (733477), Fook Tham (1921243)   +2 more
core   +2 more sources

Enantioselective Synthesis of a New Class of Stable and Functionalized Cyclopentadienes via CuH‐Catalysis

Angewandte Chemie, EarlyView.
Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa, Riccardo Bellin, Besma Boulila, Francesco Vaghi, Manuel Orlandi   +4 more
wiley   +2 more sources

Analysis of the Continuous Feeding of Catalyst Particles during the Growth of Vertically Aligned Carbon Nanotubes by Aerosol-Assisted CCVD

Nanomaterials, 2022
Aerosol-assisted catalytic chemical vapor deposition (AACCVD) is a powerful one-step process to produce vertically aligned carbon nanotubes (VACNTs), characterized by the continuous supply of the catalyst precursor (metallocene). The behavior of catalyst
Celia Castro, Rodrigo Fernández-Pacheco, Mathieu Pinault, Odile Stephan, Cécile Reynaud, Martine Mayne-L’Hermite   +5 more
doaj   +1 more source

Monomer effect on the chain transfer by diethyl zinc in olefin polymerization by metallocene catalysts [PDF]

Polyolefins Journal, 2021
The present paper systematically studies the homo- and copolymerization of ethylene or propylene using metallocene as catalyst and diethyl zinc as chain transfer agent to obtain the polyolefin waxes with narrow molecular weight distribution and with a ...
Wei Wang, Taoyi Zhang, Liping Hou
doaj   +1 more source

Correction to “Correlating the Morphological Evolution of Individual Catalyst Particles to the Kinetic Behavior of Metallocene-Based Ethylene Polymerization Catalysts”

, 2023
Correction to “Correlating the Morphological Evolution of Individual Catalyst Particles to the Kinetic Behavior of Metallocene-Based Ethylene Polymerization ...
Jelena Zarupski, Alessandro Piovano, Elena C. Groppo (16609883), Bert M. Weckhuysen, Alessandro Piovano (2902186), Florian Meirer, Coen Hendriksen, Bert M. Weckhuysen (1317540), Jelena Zarupski (9073959), Elena C. Groppo, Coen Hendriksen (2533216), Nicolaas H. Friederichs, Florian Meirer (1349805), Maximilian J. Werny, Nicolaas H. Friederichs (11538964), Iris C. ten Have, Maximilian J. Werny (14076249), Iris C. ten Have (11538961)   +17 more
core   +1 more source

The role of defect microstructure in the crystallization behavior of metallocene and MgCl2-supported Ziegler-Natta isotactic poly(propylenes)

Polímeros, 2003
The intermolecular defect distribution of poly(propylenes) of the Ziegler-Natta (ZN) and metallocene (M) types is assessed by classical fractionation and analysis of the fractions by GPC and 13C NMR.
Rufina G. Alamo
doaj   +1 more source

The Influence of Comonomer on Ethylene/α-Olefin Copolymers Prepared Using [Bis(N-(3-tert butylsalicylidene)anilinato)] Titanium (IV) Dichloride Complex

Molecules, 2011
We describe the synthesis of [bis(N-(3-tert-butylsalicylidene)anilinato)] titanium (IV) dichloride (Ti-FI complex) and examine the effects of comonomer (feed concentration and type) on its catalytic performance and properties of the resulting polymers ...
Patcharaporn Kaivalchatchawal, Pattiya Suttipitakwong, Sutheerawat Samingprai, Piyasan Praserthdam, Bunjerd Jongsomjit   +4 more
doaj   +1 more source

Innovative catalytic systems driving sustainable olefin polymerization: Recent advances and green chemistry approaches [PDF]

Polyolefins Journal
This mini-review addresses the burgeoning requirements for environmentally friendly processes in the polymer industry, focusing on recent progress in developing catalytic systems for sustainable olefin polymerization.
Farabi Hossain, Md Enamul Hoque
doaj   +1 more source